公开(公告)号：US20150319064A1

公开(公告)日：2015-11-05

申请号：US14650201

申请日：2013-10-25

Applicant: HITACHI, LTD.

Inventor： Yuji OISHI ,  Takashi ISOBE ,  Takeki YAZAKI

IPC: H04L12/26 ,  H04L5/00 ,  H04W24/08

CPC classification number: H04L43/0829 ,  H04L1/1877 ,  H04L1/203 ,  H04L5/0055 ,  H04W24/08

Abstract: An object of the present invention is to measure a packet loss rate by using information included in a general communication protocol. In a network including a transmission terminal, a communication line, and a reception terminal, the transmission terminal adds a number denoting a packet order to a transmission packet and transmits the transmission packet, and the reception terminal is a system using a protocol in which an order of packets, which have been received, is returned as an acknowledgement, and a system using a selective acknowledgement to notify of reception of discontinuous data when the reception terminal receives the discontinuous data. A method for measuring a packet loss rate by using a number of transmission packets and information on an acknowledgement and a selective acknowledgement is provided in the transmission terminal.

Abstract translation: 本发明的目的是通过使用包括在通用通信协议中的信息来测量分组丢失率。 在包括发送终端，通信线路和接收终端的网络中，发送终端向发送分组添加表示分组顺序的数字，并发送发送分组，接收终端是使用协议的系统，其中， 已经接收到的分组的顺序作为确认返回，以及当接收终端接收到不连续数据时使用选择性确认来通知接收不连续数据的系统。 在传输终端中提供了一种通过使用多个传输分组来测量分组丢失率的方法以及关于确认和选择性确认的信息。

公开(公告)号：US20170041240A1

公开(公告)日：2017-02-09

申请号：US15106183

申请日：2014-12-15

Applicant: HITACHI, LTD.

Inventor： Naoki TANIDA ,  Takashi ISOBE ,  Takeki YAZAKI ,  Tetsuya OOHASHI

IPC: H04L12/807 ,  H04L12/911

CPC classification number: H04L47/27 ,  H04L12/6418 ,  H04L47/11 ,  H04L47/36 ,  H04L47/82

Abstract: A transmission apparatus includes: a sending unit configured to send data to a receiver apparatus via the network; a receiving unit configured to receive acknowledgement data including an acknowledgement and information on a receive window size from the receiver apparatus via the network; a transmission bandwidth controller configured to control a bandwidth for data to be sent from the sending unit; a transmission bandwidth restriction unit configured to restrict the bandwidth controlled by the transmission bandwidth controller in such a manner that a data size of data for which no acknowledgement is received from the receiver apparatus among data which is sent is equal to or smaller than an upper limit size determined from the receive window size; and a switching controller configured to switch activation and inactivation of the transmission bandwidth restriction unit based on the data size and the receive window size.

Abstract translation: 发送装置包括：发送单元，被配置为经由网络向接收装置发送数据; 接收单元，被配置为经由所述网络从所述接收机设备接收包括确认的确认数据和关于接收窗口尺寸的信息; 发送带宽控制器，被配置为控制从所述发送单元发送的数据的带宽; 传输带宽限制单元，被配置为以发送的数据中从接收机装置接收到没有确认的数据的数据大小等于或者小于上限的方式来限制由传输带宽控制器控制的带宽 从接收窗口大小确定的大小; 以及切换控制器，被配置为基于所述数据大小和所述接收窗口大小来切换所述传输带宽限制单元的激活和失活。

公开(公告)号：US20160149817A1

公开(公告)日：2016-05-26

申请号：US14887805

申请日：2015-10-20

Applicant: Hitachi, Ltd.

Inventor： Naoki TANIDA ,  Takashi ISOBE ,  Tetsuya OOHASHI

IPC: H04L12/801 ,  H04L29/06 ,  H04L12/26

CPC classification number: H04L47/193 ,  H04L43/062 ,  H04L43/08 ,  H04L43/18 ,  H04L69/22

Abstract: An analysis device analyzes a packet processed by a communication device connected with a network. The analysis device includes a receiver and an analyzer. The receiver receives a mirror packet of the packet transmitted through the network. The analyzer obtains and analyzes a portion of information in the mirror packet, and determines a necessity or lack thereof for a function of the communication device to be performed on the packet transmitted through the network based on analysis results of the analyzer.

Abstract translation: 分析装置分析由与网络连接的通信装置处理的分组。 分析装置包括接收器和分析器。 接收器接收通过网络发送的分组的镜像分组。 分析仪根据分析仪的分析结果，获取并分析镜像分组中的信息的一部分，并确定对通过网络发送的分组执行的通信设备的功能的必要性或不足。

公开(公告)号：US20150318958A1

公开(公告)日：2015-11-05

申请号：US14650438

申请日：2013-11-20

Applicant: Hitachi, Ltd.

Inventor： Yuji OISHI ,  Takashi ISOBE ,  Takeki YAZAKI

IPC: H04L1/08 ,  H04L29/06 ,  H04L12/823

CPC classification number: H04L1/08 ,  H04L1/1877 ,  H04L1/1887 ,  H04L47/323 ,  H04L69/163

Abstract: To efficiently retransmit discarded packets and to reduce discarded location storage capacity, it is provided a communication apparatus to be coupled to a network, the communication apparatus being configured to: transmit data to a correspondent communication apparatus coupled to the network; receive an acknowledgement transmitted from the correspondent communication apparatus; monitor whether or not a storage capacity shortage for storing discarded locations of transmitted data in the correspondent communication apparatus; and retransmit data by setting a retransmission priority for discarded locations in a case of the storage capacity shortage.

Abstract translation: 为了有效地重传丢弃的分组并减少丢弃的位置存储容量，提供了要耦合到网络的通信装置，所述通信装置被配置为：向耦合到网络的对应通信装置发送数据; 接收从相应通信设备发送的确认; 监视在所述对应通信装置中存储发送数据的丢弃位置的存储容量不足; 并且在存储容量不足的情况下，通过设置丢弃位置的重发优先级来重传数据。

公开(公告)号：US20160323421A1

公开(公告)日：2016-11-03

申请号：US15097497

申请日：2016-04-13

Applicant: HITACHI, LTD.

Inventor： Yoshiki SAKURAI ,  Takashi ISOBE ,  Kenzaburo FUJISHIMA

IPC: H04L29/06 ,  H04L12/26 ,  H04L5/00 ,  H04W24/08

CPC classification number: H04L69/163 ,  H04L43/0841 ,  H04L43/0888 ,  H04W24/02 ,  H04W24/08

Abstract: When a TCP packet communication acceleration technique is applied to a wireless communication network, an acceleration effect is determined according to various pieces of information in real time, and acceleration control is dynamically performed to efficiently accelerate the communication by the use of the TCP of a wireless terminal present in the wireless communication network. A wireless communication system including at least one wireless terminal and at least one base station that communicates with the wireless terminal further includes an information collection server that collects various pieces of information from the base station and the wireless terminal. The base station includes a packet acceleration unit that accelerates a TCP packet communication, and the information collection server determines whether to accelerate the base station from the various pieces of information, or not, and controls the acceleration of the base station on the basis of its determination result.

Abstract translation: 当将TCP分组通信加速技术应用于无线通信网络时，根据各种信息实时地确定加速度效果，动态地进行加速控制，通过使用无线TCP的TCP来有效地加速通信 终端存在于无线通信网络中。 包括至少一个无线终端和至少一个与无线终端通信的基站的无线通信系统还包括从基站和无线终端收集各种信息的信息收集服务器。 基站包括加速TCP分组通信的分组加速单元，并且信息收集服务器判断是否从各种信息加速基站，并且基于它的控制来控制基站的加速度 确定结果。

公开(公告)号：US20140192647A1

公开(公告)日：2014-07-10

申请号：US14149109

申请日：2014-01-07

Applicant: HITACHI, LTD.

Inventor： Masaki YAMADA ,  Takashi ISOBE ,  Tomoyuki OKU ,  Yuichi ISHIKAWA ,  Takeki YAZAKI

IPC: H04L12/801

CPC classification number: H04L47/127 ,  H04L47/193

Abstract: To prevent the switching time influences power saving efficiency and packet loss prevention performance, it is provided a network apparatus for transferring packets, including a transfer part for transferring received packets to a given destination, and a determining part for obtaining traffic volume of the packets to be transferred. The determining part determines periodicity of changes to the traffic volume, predicts traffic volume after a predetermined period of time with use of the determined periodicity, and controls transfer performance of the transfer part based on a result of the traffic volume prediction.

Abstract translation: 为了防止切换时间影响节电效率和分组丢失防止性能，提供了一种用于传送分组的网络装置，包括用于将接收到的分组传送到给定目的地的传送部分，以及用于获得分组的流量的确定部分 被转移。 确定部分确定对业务量的变化的周期性，使用确定的周期性预测在预定时间段之后的业务量，并且基于业务量预测的结果来控制转移部分的传送性能。

公开(公告)号：US20140071986A1

公开(公告)日：2014-03-13

申请号：US14074244

申请日：2013-11-07

Applicant: HITACHI, LTD.

Inventor： Takashi ISOBE

IPC: H04L12/927

CPC classification number: H04L47/801 ,  H04L1/187 ,  H04L69/163 ,  H04L69/28

Abstract: In communication using TCP, since the transmission bandwidth is significantly influenced by RTT and discard rate, there was a problem that only the transmission bandwidth significantly lower than the contracted bandwidth could be obtained under the environment such as WAN causing large RTT, large hop number and many discarded segments. There is provided an apparatus connected to a receiving side terminal having a means for feeding back to notify all discarded segments to an apparatus connected to a transmitting side terminal; a means for retransmitting the discarded segments fed back to be notified to the apparatus connected to the transmitting side terminal; and a means for controlling transmission bandwidth, based on retransmission bandwidth and discard bandwidth by the apparatus connected to the transmitting side terminal.

Abstract translation: 在使用TCP的通信中，由于传输带宽受到RTT和丢弃率的显着影响，所以存在如下问题：在诸如WAN的环境下，只有具有明显低于收缩带宽的传输带宽才能产生大的RTT，大跳数和 许多废弃的细分。 提供一种连接到接收侧终端的装置，具有用于反馈的装置，以将所有丢弃的段通知给连接到发送侧终端的装置; 用于重传被反馈的废弃分段以通知连接到发送侧终端的装置的装置; 以及基于连接到发送侧终端的装置的重传带宽和丢弃带宽来控制传输带宽的装置。

公开(公告)号：US20170064489A1

公开(公告)日：2017-03-02

申请号：US15230818

申请日：2016-08-08

Applicant: HITACHI, LTD.

Inventor： Naoki TANIDA ,  Takashi ISOBE

IPC: H04W4/00 ,  H04L29/08

CPC classification number: H04L69/16 ,  H04L67/10 ,  H04L69/22 ,  H04W4/70 ,  H04W84/047

Abstract: A network system including a plurality of network apparatuses comprises an analysis part configured to analyze a communication status of a communication flow which is a control unit of a communication between terminals. The analysis part includes a reception process part configured to generate and update flow information, and a degradation point identifying part configured to detect degradation of communication quality of the each of the plurality of communication flows. The degradation point identifying part includes an index calculating part configured to calculate a plurality of indexes that are similar to a packet loss rate, the plurality of indexes requiring a smaller amount of data for an analysis and therefore requiring a shorter period of time for calculation. The degradation point identifying part determines whether communication quality of the communication flow has degraded or not based on the indexes.

Abstract translation: 包括多个网络装置的网络系统包括被配置为分析作为终端之间的通信的控制单元的通信流的通信状态的分析部。 分析部分包括被配置为生成和更新流信息的接收处理部分，以及被配置为检测多个通信流中的每一个的通信质量的劣化的劣化点识别部。 劣化点识别部分包括：索引计算部分，被配置为计算与分组丢失率相似的多个索引，所述多个索引需要较小量的数据用于分析，因此需要更短的计算时间。 劣化点识别部分基于索引来确定通信流的通信质量是否已劣化。

公开(公告)号：US20170041242A1

公开(公告)日：2017-02-09

申请号：US15205699

申请日：2016-07-08

Applicant: HITACHI, LTD.

Inventor： Takashi ISOBE

IPC: H04L12/801 ,  H04L12/715 ,  H04L12/24

CPC classification number: H04L47/29 ,  H04L41/06 ,  H04L41/142 ,  H04L43/04 ,  H04L43/08 ,  H04L47/2441

Abstract: A network system comprising a plurality of communication apparatuses, wherein the network system includes an analysis part for analyzing a communication flow to classify a plurality of communication flows by communication types. The analysis part includes: a feature amount obtaining part for obtaining, for each of the plurality of communication flows, management information on the communication flow including a plurality of feature amounts; a cluster analysis part for analyzing the management information on the communication flow to generate a plurality of clusters each made up of the plurality of communication flows; and a cluster classification part for classifying the plurality of clusters by communication types based on an analysis result obtained using at least one of the plurality of feature amounts of the plurality of communication flows included in each of the plurality of clusters.

Abstract translation: 一种包括多个通信装置的网络系统，其中所述网络系统包括用于分析通信流的分析部分，以通过通信类型对多个通信流进行分类。 分析部分包括：特征量获取部分，用于为多个通信流中的每一个获得关于包括多个特征量的通信流的管理信息; 聚类分析部分，用于分析通信流的管理信息，以生成由多个通信流组成的多个聚类; 以及群集分类部，根据通过使用包含在所述多个群集的每一个中的所述多个通信流中的所述多个特征量中的至少一个获得的分析结果，通过通信类型对所述多个群进行分类。

公开(公告)号：US20150341272A1

公开(公告)日：2015-11-26

申请号：US14715805

申请日：2015-05-19

Applicant: HITACHI, LTD.

Inventor： Takashi ISOBE ,  Takeki YAZAKI ,  Takuro MORI

IPC: H04L12/801 ,  H04L12/879 ,  H04L1/16 ,  H04L1/18

CPC classification number: H04L47/16 ,  H04L1/1642 ,  H04L1/1835 ,  H04L1/1854 ,  H04L47/10 ,  H04L47/193 ,  H04L47/25 ,  H04L47/34 ,  H04L47/40 ,  H04L49/901

Abstract: When a proxy device is used between a transmission terminal and a reception terminal, receives final data from the transmission terminal, and fails immediately thereafter, a situation is avoided where transmission is completed in the transmission terminal, but reception is not completed in the reception terminal. There is provided a means for not returning ACK when a data packet is received in a state in which there is no data which waits for ACK and transmission of which is in progress, and there is no data which waits for arrangement and reception of which is in progress in the proxy device, for returning ACK for data received one step before when a data packet is received in a state in which there is data which waits for ACK and transmission of which is in progress, or there is data which waits for arrangement and reception of which is in progress.

Abstract translation: 当在发送终端和接收终端之间使用代理设备时，从发送终端接收最终数据，并且立即失败，避免在发送终端中完成发送但在接收终端中未完成接收的情况 。 提供了一种在不存在等待ACK并且其发送正在进行的数据的状态下接收到数据分组时不返回ACK的装置，并且没有等待其布置和接收的数据是 在代理设备中正在进行中，用于在数据包被接收到一个数据包时接收到的数据的ACK返回ACK，其中存在等待ACK和正在进行的传输的数据的状态，或者存在等待布置的数据 并正在接收接收。